公开(公告)号：US07337321B2

公开(公告)日：2008-02-26

申请号：US10230431

申请日：2002-08-29

Applicant: Koichi Terada ,  Yukio Fujii ,  Yoshifumi Fujikawa ,  Taruhi Iwagaki

Inventor： Koichi Terada ,  Yukio Fujii ,  Yoshifumi Fujikawa ,  Taruhi Iwagaki

IPC: H04L9/00

CPC classification number: H04N1/32325 ,  G06T1/0021 ,  H04N1/32144 ,  H04N2201/3233 ,  H04N2201/3269 ,  H04N2201/327

Abstract: A technique for distributing digital contents capable of effectively protecting copyrights and the like on the basis of invisible electronic watermark information and electronic watermark information is to be provided. On the sending side, additional information including copyright-related information is embedded into digital contents in advance as invisible electronic watermark information, while on the receiving side, additional information as the embedded invisible electronic watermark information is decoded and extracted as visible watermark information, the extracted information is embedded again into the digital contents, and the additional information is distributed or outputted as visible information together with the digital contents.

Abstract translation: 提供一种用于分发基于不可见电子水印信息和电子水印信息有效保护版权等的数字内容的技术。 在发送侧，包括版权相关信息的附加信息被预先嵌入到数字内容中作为不可见的电子水印信息，而在接收侧，作为嵌入的不可见电子水印信息的附加信息被解码并提取为可视水印信息， 提取的信息再次嵌入到数字内容中，附加信息作为可视信息与数字内容一起分发或输出。